[Leica] Forscher's lights

[mark at rabinergroup.com (Mark Rabiner)]

> You're making a neg, so you're giving the highlights a chance to fill-in 
> with
> the bump, and bringing up shadow detail with the flash, depending on the
> duration of each exposure.
> 
> Yeah, lith film has no toe or shoulder, but the halftone screen you're
> exposing through is continuous tone. Being so slow (ASA 2?) the threshold 
> is
> pretty long.
> 
> 
> ----- Original Message ----
> From: Mark Rabiner <mark at rabinergroup.com>
> To: Leica Users Group <lug at leica-users.org>
> Sent: Tue, November 17, 2009 8:47:07 PM
> Subject: Re: [Leica] Forscher's lights
> 
>> Back in the lith film/process camera days this was standard procedure in
>> shooting halftones; there was a bump, which was a brief exposure of the 
>> film
>> with out the overlaying dot screen, and the flash, which usually came 
>> after
>> the main exposure, and was exposed through the dot screen. The idea was to
>> punch up contrast.
>> 
>> The flash lamp hung above the back of the camera, hooked to a timer, and 
>> the
>> exposure took place with the camera back dropped and the film held in 
>> place
>> on
>> the vacuum back.
> 
> 
> Or is it punch Down the contrast?
> 
> 
> Mark William Rabiner
> 
> 


I've done them but its been awhile. I used to teach it in a community
college.  Still think your bringing in more information by doing that and in
effect lowering contrast.

Mark William Rabiner